Fluid end pump head



June 19, 1956 B. F. WALDRON 2,751,267

FLUID END PUMP HEAD Filed March 1, 1954 min mum l V i C? m 5 .B.Z'W&Zdron INVENTOR ATTORNEYS 2,751 ,267 ?atented June 19, 1956 iice FLUID END PUMP HEAD Benjamin Franklin Waldron, Corpus Christi, Tex.

Application March 1, 1954, Serial No. 413,235

2 Claims. (Cl. 309-3) This invention relates to pump construction, an important Object of the invention being to improve generally the construction of the fluid end pump head disclosed in my patent granted September 1, 1953, No. 2,650,868.

Another important object of the invention is to provide means for adjusting liners of pumps of this character so that the packing interposed between the shoulders of the liner and cylinder may be readily tightened to seal the connection between the liner and cylinder of the pump.

A still further object of the invention is to so construct and arrange the adjusting pins or pistons of the pump head that they will be secured against displacement under excessive pressure directed to the liner cage of the pump and with which the adjusting pins contact.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combination of parts, hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

Referring to the drawing:

Figure 1 is a longitudinal sectional view through the end of a pump cylinder and head mounted thereon.

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1.

Referring to the drawing in detail, the reference character indicates a pump cylinder which is of conventional structure, and is provided with an upstanding extension 6.

The pump cylinder is counterbored at 7.

As shown, a liner 3 fits in the cylinder 5 and is adjustable longitudinally thereof, the cylinder 5 having a shoulder 9, while the liner 8 has a shoulder 14). The packing indicated at 11, is disposed between shoulders S and 10 to provide a tight fit between the liner and pump cylinder.

Removably mounted on the inner end of the liner 8, is liner cage 12 which is formed with a plurality of openings through which material flows in passing through the pump.

This liner cage 12 extends to a point adjacent to the pump head 13, which is bolted to the pump cylinder by means of bolts 14.

The pump head 13 is formed with openings 15 in which the tubular members 16 are held, the tubular members 16 providing supports for the pistons 17 that extend into the pump cylinder for contact with the end of the liner cage 12, as shown by Fig. l of the drawing.

The tubular members 16 have external threads which are engaged by the cap screws 18 that bear against the outer ends of the pistons 17, so that by rotating the cap screws 18 the pistons may be moved inwardly to move the liner cage towards the end of the liner 8, compressing the packing 11 between shoulders 9 and 10.

Formed integral with the pistons 17 are annular ribs 19 which are so arranged that the annular ribs 19 provide a stop should the liner cage be subjected to excessive pressure which would result in forcing the pistons 17 through the cap screws. Thus, it will be seen that because of the annular ribs 19 of the pistons 17 the pistons cannot be displaced from the pump, since the ribs as indicated, will strike the inner ends of the tubular members 16, which will restrict outward movement of the pistons 17, holding the pistons within the pump.

As shown by Fig. l of the drawing, packing rings 20 are held in ring grooves formed in the tubular members 16, which rings provide a seal between the tubular members 16 and pistons 17. Thus it will be seen that when the cap screws 18 are rotated and moved towards the pump head 13, the thread compound indicated at A will be forced to move between the threads of the tubular members 16 thoroughly lubricating the same.

The jamb nuts 21 are moved against the cap nuts after the jamb nuts 21 have been properly adjusted, securely locking the cap nuts against movement.

Having thus described the invention, what is claimed is:

1. The combination with a pump cylinder and a liner within and adjustable longitudinally thereof, of a head secured to one end of said cylinder providing a substantially large space between the liner and head, at least one tubular member carried by said head, said head having an opening in which siad tubular member is tightly engaged, a piston slidable in said tubular member and engaging one end of the liner, an adjusting sleeve threadedly engaged with said tubular member and having a closed end against which the other end of the piston abuts, for shifting of the piston longitudinally of the tubular member responsive to threading of the sleeve upon said tubular member, and an annular rib formed on said piston disposed within said space between the liner and head, and normally spaced from said liner and head, said annular rib adapted to engage the end of said tubular member, limiting movement of said piston in one direction, under excessive pressure directed to said liner.

2. The combination with a pump cylinder and with a liner mounted within and adjustable longitudinally of said cylinder, of a head secured to and closing one end of the cylinder, said head having at least one tapered opening, a tubular member having a base tapered correspondingly to said opening, said base being wedgably engaged in the opening, said tubular member including an exteriorly threaded extension outstanding from the external surface of the head, a jam nut threaded on said extension and resting against the external surface of the head, there being an end-to-end bore formed in said tubular member, a piston slidable in said bore and abutting at one end against the liner, an adjusting sleeve threaded on said extension, said adjusting sleeve having a closed end and engaging the other end of the piston, whereby to adjust the piston longitudinally of said tubular member responsive to threading said sleeve upon the extension, and stop means on the inner end of said piston embodying an annular rib on the piston normally spaced a substantial distance from the end of the tubular member adapted to engage one end of said tubular member preventing displacement of the piston from the cylinder under excessive pressure directed to said liner.

References Cited in the file of this patent UNITED STATES PATENTS 

